Ar is not suitable for the role of a werewolf or a warrior, as he is not from the Destroyers.
He could have been a werewolf...
Firstly, on the fifth night, he was most likely targeted by a stalker.
Secondly, the description of the execution.
Thirdly, Ara summoned the investigator to himself. Given that he had a negative status, isn't that a bit presumptuous? Most likely, his status was positive, and he hoped to cover himself with some of the city roles.